ITM: Index Target based on natural mortality rate

Description Usage Arguments Details Value Required Data Rendered Equations Author(s) Examples

View source: R/MPs_Output.R

Description

An index target MP where the TAC is modified according to current index levels (mean index over last number of years determined by natural mortality (M)) relative to a target level.

Usage

1
ITM(x, Data, reps = 100, plot = FALSE)

Arguments

x

A position in the data object

Data

A data object

reps

The number of stochastic samples of the MP recommendation(s)

plot

Logical. Show the plot?

Details

The TAC is caluclated as:

\textrm{TAC}_y = \textrm{TAC}_{y-1} δ I

where δ I is the ratio of the mean index over 4\frac{1}{M}^{1/4} years to the reference index ([email protected]).

The maximum fractional change in TAC is determined by mc, defined as mc = \textrm{max}≤ft(\frac{5 + 25M}{100}, 0.2\right)

Value

An object of class Rec with the TAC slot populated with a numeric vector of length reps

Required Data

See Data for information on the Data object

ITM: Ind, Iref, MPrec, Mort

Rendered Equations

See Online Documentation for correctly rendered equations

Author(s)

T. Carruthers

Examples

1

DLMtool documentation built on Dec. 6, 2019, 9:06 a.m.